The odd one out of the 9 170s operated by South West Trains equipped with the later style light clusters.

New to Southern and built to their spec it retained its Southern interior during its time at South West Trains before returning to Southern for conversion into a 171 when the other 170s left for TPE.

Requires

Steam Class 170 Pack
https://store.steampowered.com/app/208364/Train_Simulator_BR_Class_170_Turbostar_DMU_AddOn/

OR

Steam Edinburgh – Glasgow Route
https://store.steampowered.com/app/65216/Train_Simulator_EdinburghGlasgow_Route_AddOn/

AND

Armstrong Powerhouse Class 170 Enhancement Pack
https://www.armstrongpowerhouse.com/index.php?route=product/product&path=36_91&product_id=185

Includes a 2 car Quick Drive

Nice easy installation no file copying required as it lives in the existing SWT_AP folder.